The Clockwork Inheritance

When the reclusive inventor Arthur Penhaligon died, he left behind no will—only a small, brass key and a riddle etched into the grandfather clock in his hallway. His estranged niece, Maya, returns to the crumbling Blackwood Manor hoping for a quick sale, but she soon discovers that the house itself is a puzzle box waiting to be solved. As she unlocks secret passages and deciphers mechanical ciphers, she realizes she isn't the only one hunting for Arthur's legacy. A shadow organization known as The Guild of Gears is watching her every move, and they will stop at nothing to retrieve the device Arthur hid—a machine rumored to manipulate time itself.